在线cao,18av导航站_永不迷路,国产人妖自拍,日韩欧美亚洲,免费一级毛片麻豆精品,亚洲欧美综合在线观看,一级免费a

Our products are:
1. Ceramic glass with the thermal expansion 0-10 and thermal shock 650-700.
2. Borosilicate glass pressed glasses such as reflectors, lens something others with the thermal expansion coefficient 33-48.
3 Process glass discs and sheets: edges step, straight and round ground, thermally tempered
The min.thickness 1mm
The max.thickness 15mm